Transmission-gearing for motor-vehicles.



PATENTED SEPT. 13, 1904-.

APPLICATION FILED NOV. 20. 1902.

2 SHEBTS-SHEET 1.

NO MODEL.

PATENTED SEPT. 13, 1904.

V 0. SCHMIDT. TRANSMISSION GEARING FOR MOTOR VEHICLES.

APPLICATION FILED NOV. 20, 1902.

2 SHBETSSHBBT 2.

N0 MODEL.

8 wanton 625/40 iguana-- MW Li UNITED STATES Patented September 13,1904.

PATENT Orrice.

CHARLES SCHMIDT, OF I/VARREN, OHIO, ASSIGNOR TO PACKARD MOTOR OARCOMPANY, OF WARREN, OHIO, A CORPORATION OF WEST VIRGINIA.

TRANSMISSION-(BEARING FOR MOTOR-VEHICLES.

SPECIFICATION forming part of Letters Patent No. 769,840, datedSeptember 13, 1904.

Application filed November 20, 1902. Serial No. 132,113. (No model.)

T 0 all whom/ it may concern:

Be itknown that I, OHARLEs SCHMIDT, acitizen of France, residingatVVarren, in the county of Trumbull, State of Ohio, have inventedcertain new and useful Improvements in Transmission-Gearing forMotor-Vehicles, of which the following is a specification.

This invention relates to improvements in transmission-gearing formotor-vehicles, the object being to simplify the construction and renderthe operation of such gearing easy and positive.

The invention is illustrated in the accompanying drawings, in whichFigure 1 is a longitudinal central section through a system of gearing.Fig. 2 is a transverse section about on the line A A of Fig. 1. Fig. 3is an elevation of the controlling-levers.

. Fig. 4 is a side'elevation of said levers, and

Fig. 5 is a detail of the outside locking-plate. Fig. 6 is an elevation,partly in section, on the line B B of Fig. 3.

Referring to the drawings, 1 indicates the motor-shaft, and 2 the drivenshaft, which latter shaft is suitably connected to the driving-wheels.Upon the driven shaft are rigidly mounted four gears a, b, 0, and d,increasing in size in the order named. Mounted to turn with and slide onthe motor-shaft is a sleeve 3, to which are rigidly secured four gearsa, b, c, and cl, each decreasing in size in the order named and whichare of suitable diameters to intermesh, respectively, with the gears 60,I), 0, and d. The several gears above described are so related that theymay be all disengaged or that the gears on. the sleeve 3 may be engagedsuccessively with the gears on the shaft 2 in the order of their sizes.Thus when the sleeve is moved to the extreme left the smallest gear, (Z,will be engaged with the gear (Z, and the driven shaft will be operatedat its slowest speed. Movement of the sleeve to the right will firstdisengage the gears (Z Cl and then engage the gears 0 c, operating thedriven shaft at the next higher speed. Further movement of the sleeve tothe right will next disengage the gears c c and then engage the gears I)Z), and finally a further movement to the right will first disengage thegears 12 b and then engage the gears 60 a. The sleeve 3 is shifted bymeans of a sliding rod 4, which has an arm 5 engaging an annular groove6 in the sleeve. The rod 4 is operated by a second rod 7 link 8, arm 9,shaft 10, and lever 11, the arm 9 and link 8 being suitably connectedfor instance, as shown in Fig. 6-by a rod or link R, extending from thearm 9 to an arm on a sectorgear S, which meshes with a second sectorgearS, having an arm with which the link 8 is attached. The lever operatesbetween two notched sector-plates 12 13 and is provided with aspring-pressed latch 14, which tends to enter the notches. The latch isconnected through rod 15, lever 16, and rod 17 with a button 18 on theend of the lever. A spring 19 within the handle tends to raise thebutton and throw the latch into the notches. By pressing the button 18the latch may be withdrawn from the notches. Each plate is provided withfour notches corresponding to the four forward speeds effected by thegearing above described.

The backward movement is obtained by a backing-gear 20, which is adaptedto be thrown into mesh with the gears (Z d when the latter are adjacentto but not in mesh with each other, the backing-gear being broad enoughto engage both gears when they are out of mesh. The backing-gear 20 ismounted in a yoke 21, which swings on a fixed pivot 22.

The yoke 21 has an arm 23, which is engaged by a roller on a shorttwo-armed lever 24, mounted on a fixed pivot 25. The spring 26 tends tohold the backing-gear 20 out of mesh with the driving-gears, and saidbacking-gear can be thrown into mesh with the gears cl (Z by rocking thelever 24. Said lever 24 engages a flat surface 27 on the arm 23 and runsthereon slightly past the dead-center between said surface and theroller, thus locking them against the influence of the spring 26. Thelever 24: is operated by a rod 28, which extends through a bracket 29beneath the shaft 10. The lever 11 is mounted upon a pivot 30,

' to swing sidewise, although the shaft must turn with the lever. Thelower arm 11 of lever 11 has a T-piece 31, which swings in thehook-shaped extremity 32 of the rod 28. A spring 33tends to throw therod 28 outward to bring the hook 352 into the normal plane of the arm11. On the inner end of the rod 28 is an open yoke or hook 34, whichengages an arm of the lever 24 and operates said lever. The hand-lever11 can only be rocked sidewise on the pivot when it registers with theslot or opening 13 in the two-part sector-plate 13. When the lever is inthis position, the gears d cl are adjacent to each other and none of thegears a Z) 0 (Z are in mesh with their corresponding gears. When it isdesired to back the vehicle, the lever 11 is brought to this middleposition and then moved sidewise through the slot 13, which throws thebacking-gear into mesh with the gears (Z d by means heretoforedescribed, thus backing the vehicle at the slowest speed.

In the drawings is shown a brake-lever 35, operating a brake-shaft 36within the shaft 10, and a tooth-sector 37 for locking the brakelever;but these brake devices are not included in the present invention.

It will be seen that the present invention provides for four speedsforward and one speed backward and that the mechanism involved is simpleand positive in construction. The operation will be obvious from-thepreceding description.

Having described the invention, what is claimed as new is 1. In atransmission-gearing for motor-vehicles, the combination with amotor-shaft, the driven shaft, and the gears of different sizes mountedthereon, of a hand-lever for throwing said gears into and out of mesh, abacking-gear, and means for operating said backing-gear by a sidemovement of said handlever to throw it into and out of operation.

2. In a transmission-gearing for motor-vehicles, the combination with adriven shaft, a motor-shaft, and relatively movable gears 'on saidshafts, of a backing-gear, a lever constructed to swing in twodirections, and means whereby when the lever is swung in one directionthe relatively movable gears will be shifted and when it is swung in adirection transverse to that aforesaid the backing-gear will be throwninto and out of operation.

3. In a transmission-gearing for motor-vehicles, the combination with adriven shaft having gears fixed thereon, a motor-shaft having gearsslidable thereon, and a backing-gear adapted and arranged to be moved ina circular path into and out of mesh with gears on both shafts, of ahand-lever for shifting the slidable gears, a sector for guiding saidhandlever, and a pivot upon which said hand-lever may be movedlaterally, said sector having an opening or recess into which thehand-lever is moved laterally while moving the backing gear to and fromoperative position.

4. In a transmission-gear for motor-vehi- 'cles, the combination withthe driven shaft, the motor-shaft, and the relatively movable gearsthereon, of the backing-gear arranged to swing in a circular path upon apivotal support, a lever for operating said backinggear, a sliding rodfor operating said lever, and a hand-lever adapted to shift the gears bya-movement in one direction and to operate said sliding rod and move thebacking-gear by a movement in a second direction.

5. In a transmission-gearing for motor-vehicles, the combination withthe driven shaft, the motor-shaft, the relatively movable gears thereon,and the backing-gear, of the shaft 10 having connections to saidrelatively movable gears, the lever 11 connected to said shaft by apivot whereby it may swing laterally without turning said shaft, andconnections between said lever and the backing-gear whereby the lattermay be thrown into and out of operation by a movement of the lever uponits pivot.

6. In a transmission-gearing for motor-vehicles, the combination withthe driven shaft, the motor-shaft, the relatively movable gears thereon,and the backing-gear, of a lever arranged to swing in a given plane toshift the relatively movable gears, a rod 28 adapted to be engaged bysaid lever in one of its positions, and connections between said rod andthe backing-gear, said rod being operated by a lateral movement of thelever.

7. In a transmission-gearing for motor-vehicles, the combination with adriven shaft, a motor-shaft, relatively movable gears thereon, and abacking-gear, of a pivoted arm upon which said backing-gear is mounted,a lever 2r adapted to operate said arm and to lock said gear inoperative position, an operatinglever and a connection between saidoperating-lever and said lever 24, the said operating-lever beingadapted to shift the relatively movable gears by a movement in onedirection and to shift the backing-gear by a lateral movement.

In testimony whereof I affix my signature in presence of two witnesses.

CHAS. SCHMIDT.

Witnesses:

JAs. W. PACKARD, W. D. PACKARD.

